Dewitt c



(No Model.)

- D. G. DEMAREST.

- FOUNTAIN PEN. No 353,053. Patente'd Nov. 23, 1886.

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\DEWITT o. DEMAREST, OF DENVER, OOLORADO. 7

FOUNTAIN-PEN.

SPECIFICATION forming part of Letters Patent No.'353,053, dated November23, 1886.

Application filed April 20. 1886. Scria1No.199,524. (No model.)

To' all whom it 11mg concern.-

Be it known that I, DEWITT C. DEMAREST, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented new and useful Improvements in Fountain-Pens, of which thefollowing is a specification.

I have improved the fountain-pen in which a small tube having a sideopening delivers the ink to the pen from the reservoir, and in which thefeed th rough said tube is effected by a strip of wood or similarabsorbent material.

acting as a wick to convey the ink to the pen, while said tube has aseparate air-vent. Such fountain-pens have also been provided with afeeding-pin arranged in the tube, so as to be reciprocated in the tubeby the pressure upon the pen. As'a feeder, I- employ a spring-wirehaving one or more bends, so as to bear upon the tube at its open endand upon the walls of the tube back of its open end, whereby the air iscaused to enter the handle-reservoir through the same opening throughwhich the ink is caused to flow to the pen; and the wire is heldin thetube by springcontact at one or more points on the inner walls ofsaidtube. The delivering end of the feeding-tube is curved, and itsink-delivering aperture is formed at its side, extending from the pointback a short distance, and widens at the point, so that the side of thetube opposite the opening curves toward its open end. r My improvementgives-a free outflow for the ink and a free inflow of the air at oneandthe same opening in the feedingtube, because .the spring of the wireholds it in place at the open end of the feeding-tube, while leaving aspace under and at each side of, the wire at the said delivery-opening,which the ink fills, and thus gives a free flow under the wire,

while the air-vent is over the wire at the out- The accompanyingdrawings show the wirespring ink-feeder, in which Figure l is alongitudinalsection of so much of a fountain-pen as illustrates the useof my spring-wire feeder in connection with the supply-reservoir and thepen. 'Fig. 2 shows the ink-feeding tubeholding section; and Fig. 3, alongitudinal section of the same, showing the spring-wirefeeder. Fig. 4shows the ink-feeding tube; and Fig. 5 is asection of the same, showingthe springwire feeder therein and removed therefrom.

The handle A is hollow, forms the ink-supplying reservoir for the pen,and screws upon the section 0, which holds the ink-feeding tube and thepen. The section 0 has the usual penclar'nps, D, and thefeeding-tube Eis secured in a central opening, 0, therein, so as to project therefromat both ends. A cap, B, covers the pen-holding end of the section 0 whenthe pen is notin use. The case-forming parts of the pen and thefeeding-tube are of hard rubber, and they may be made as shown, or inany suitable way, as my improvement lies in the feeding-tube having thespring-wire feeder.

The feedingtube E is of hard rubber, is open 'at both ends, is fittedtightly within the penholding section 0, projects therefrom at one.

end into the supply-reservoir, and has a'side opening, 0, at its otherend of an oblong form,

so that its side, a, opposite this opening is curved upward toward thepen, to cause the ink to flow to the side opening from the tube directlyupon the pen G, which projects beyond the end of the tube close to ornearly touching it.

The wire feederF isa slender strand of nonabsorbent material'-such assilver, platinum, or other non-absorbent material-of sufficientelasticity to permit of the formation of bends therein and the curvingof it to form one or open end. its spring function holds it in openpoint of the tube,and abend, f, just back of the bearing-point,touchingor nearly in contact with the pen, holding the ink-supplyjust at thepoint of the latter without obstructing its flow to such point, andgiving a free entrance for the air into the opening 6, so that the airwill follow the wire in bubbles into the reservoir I.

The binding or holding of the wire feeder in its proper adjustment inthe tube is by one or more bends, f f, which form bearings on the inneropposite sides of the walls of the tube, preferably, as shown, at ornear the open end of the tube. At the pointf the bend in the wire may beflattened so as to form a flat surface-bearing,to prevent the turning ofthe wire from its proper position and to facilitate its adjustment inthe tube. These bearing-bends need only be such as to give the requisiteholding function at one or more points, so that the wire willofi'er theleast obstruction to the flow of the ink, and, indeed, the inner end ofthe wire may extend centrally in the tube from its holdingpoints. Thisconstruction gives a central feeder for the ink direct to the point ofthe pen, and an inflow of the air into the reservoir at an opening forboth,having a feeding strand of non-absorbent material so formed as tokeep plenty of ink on the pen, preventing its too free flow and allowingthe ink to run back into the reservoir when the pen is not in use.

The wire feeder can be moved or turned to free any clogging or gunnning;butitsliability to gum or clog is greatly lessened by reason of thefeeder having only a point-bearing, b,just at the open side at the endof the feedingtube, and a point, f, extending into the opening away fromthe wall of the tube, and close to or touching the pen. It is thisspecial re lation of the bearing-points and form of the wire feeder thatI have found to give a satisfactory use of the pen in the flow of theink and the freedom of the pen from clogging. The feeding-tube is madeadjustable within the pen-holding section, so as to allow pens ofdifferent lengths to be used.

The feeding-tube having a side opening at its delivering end for theoutflow of the ink to the pen and a separate opening for the inflow ofthe air has been used with an interior feeding-strip of wood, dividingthe said tube into two separate -passages,which are liable to becomeclogged and to prevent the free flow of the ink. Such feeding-tubes havealso been provided with a central feeding-pin seated in the wall of thetube at its open end, and I do not claim such constructions.

I claim- 1. In a fountain-pen, the wire feeder F, formed at its outerend with the angular bends fff,in combination with the tube E,having theopening 6, the saigl wire feeder being wholly inclosed by said tube andits bends forming retaining bearings upon the walls of the tube at itsopen end, leaving the tube unobstructed throughout its length for theoutflow of the ink and the inflow of the air, as shown and described.

2. In a fountain-pen,the combination of the feeding-tube, having theopening 6, with the feeder F, of round wire, extending through said tubeinto the reservoir, its otherend having the angular bearing-bendsfff,the latter bearing being flattened, and the bendf standing within theopen end of said tube, as shown, and for the purpose stated.

,In testimony whereof I havehereunto set my hand in the presence of twosubscribing witnesses.

DEWITT (J. DEMAREST.

Witnesses:

AUSTIN \V. SMITH, XVILLIAM B. PALMER.

